Chosen Solution

So last week, I bought a new GPU for my Dell Precision T1500 becuase I had been using an ATI FirePro V4800 for gaming (which was terrible). My new GPU is an AMD Radeon HD 6700. When I go to play Fortnite, there is still lag even on low graphics. My ping is always under 15, so it’s not my internet. Is there a fix for this?

The HD 6700 is a very slow card (in the bottom 10% on userbenchmark). The fix for this would be to get hardware that is capable of running the games you want. Make sure you research what you actually need before you “upgrade” to another card.